djvu | 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca

General

Target

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
Size

771KB
MD5

d07907a0efa31135f9392fa623d821bf
SHA1

942c7783ad119e8f8f7b54035793c501e4204f0e
SHA256

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca
SHA512

6794144445c5d8b4ea64291cd72ddf25a536a7c96d9eeb88c71e0a0094651168ad8a9205caf5ec5da6b0b46b3f26def663f578369a1b3a084343c44e59dc455a
SSDEEP

12288:gdY2I03rbaek5sc5pYca5CEAkMQYoI+EEi4KbzjgZ2xa80/gNYWzjWno:gdYHNSRi44jgZyaxAWno

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3696-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3696-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3696-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3696-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-2-0x0000000003D00000-0x0000000003E1B000-memory.dmp	family_djvu
behavioral1/memory/3696-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2992-35-0x0000000000400000-0x000000000200C000-memory.dmp	family_djvu
behavioral1/memory/4108-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4108-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4524 icacls.exe

pid	process
4524	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b5a00b3d-9423-4156-ae69-66c806e88627\\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe\" --AutoStart"	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 api.2ip.ua
6 api.2ip.ua
15 api.2ip.ua

flow	ioc
4	api.2ip.ua
6	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

description	pid	process	target process
PID 2540 set thread context of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 set thread context of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

pid	process
3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
4108	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
4108	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2540

C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3696

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\b5a00b3d-9423-4156-ae69-66c806e88627" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4524

C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2992

C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4108

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
9e130b50184e39e32205c9dd3befee15

SHA1
150b8bfb3208d3a854996e02c1470d81530335b5

SHA256
7b5bd8bc8ac2cd655c212c4790e5d9a259046730a9f0bb51616b036da55d2c50

SHA512
3cf76690e692c874792fa99d6358ebdd3596bab33bede653067375fc7de617eb7f150f52e640d34b2d51dcbe39c5bb88381bdc0279054ab65d5f1492d89f648f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
d4ab2657a8c66b9bea2b0994240f95f3

SHA1
f441b2be888c7f731057ff0a26e128aae840d443

SHA256
e1bba3c58032d5e0f29cc5ad1147b7e5592e9e138278edd35f9be5af3544184a

SHA512
b00df04b75b26909b2ed0fe0a0967beb79bf8f9a98433e31f63f7319efe16165441bb8d059930cd974a787da81bde2ec3587c321cf4ae402c2d1f2356d8d4b51

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
329decb4d5bf8202a52ff11ba80b150a

SHA1
223537258a02058d73cd8a534c102db42fb29945

SHA256
3ba921a9404e3da85603e1849e2e2fdc89ce3c1d3967958ce16bce46cd95e6aa

SHA512
a87dfd434a94a2c5a03815136970c535e5a55739b8382dd4f8995c384fa3849c5eb74d996782c0bbb1161eab43d31fc9341f28e5c3ef1884044e766d840edf7c

Download Submit
C:\Users\Admin\AppData\Local\b5a00b3d-9423-4156-ae69-66c806e88627\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
Filesize
771KB

MD5
d07907a0efa31135f9392fa623d821bf

SHA1
942c7783ad119e8f8f7b54035793c501e4204f0e

SHA256
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca

SHA512
6794144445c5d8b4ea64291cd72ddf25a536a7c96d9eeb88c71e0a0094651168ad8a9205caf5ec5da6b0b46b3f26def663f578369a1b3a084343c44e59dc455a

Download Submit
memory/2540-2-0x0000000003D00000-0x0000000003E1B000-memory.dmp

Filesize
1.1MB

Download
memory/2540-1-0x0000000002280000-0x0000000002320000-memory.dmp

Filesize
640KB

Download
memory/2992-35-0x0000000000400000-0x000000000200C000-memory.dmp

Filesize
28.0MB

Download
memory/2992-21-0x0000000000400000-0x000000000200C000-memory.dmp

Filesize
28.0MB

Download
memory/3696-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3696-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3696-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3696-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3696-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2540 wrote to memory of 3696	2540	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 3696 wrote to memory of 4524	3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	icacls.exe
PID 3696 wrote to memory of 4524	3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	icacls.exe
PID 3696 wrote to memory of 4524	3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	icacls.exe
PID 3696 wrote to memory of 2992	3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 3696 wrote to memory of 2992	3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 3696 wrote to memory of 2992	3696	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
PID 2992 wrote to memory of 4108	2992	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe	75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads